Docker advanced -mysql master-slave replication

1、Mysql Master slave replication principle

Mysql Master slave replication principle

2、Mysql Master replication creation steps

2.1、 Create a new master server container instance 3307

docker run -p 3307:3306 --name mysql-master -v /temp/mysql/mysql-master/log:/var/log/mysql -v /temp/mysql/mysql-master/data:/var/lib/mysql -v /temp/mysql/mysql-master/conf:/etc/mysql -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7

2.2、 Get into /temp/mysql/mysql-master/conf New under the directory my.cnf

Lord my.cnf Profile contents

[mysqld]
##  Set up server_id, You need to be unique in the same LAN 
server_id=101 
##  Specify the name of the database that does not need to be synchronized 
binlog-ignore-db=mysql  
##  Turn on binary log function 
log-bin=mall-mysql-bin  
##  Set the memory size of binary log （ Business ）
binlog_cache_size=1M  
##  Set the binary log format to use （mixed,statement,row）
binlog_format=mixed  
##  Binary log expiration cleanup time . The default value is 0, Does not automatically clean up .
expire_logs_days=7  
##  Skip all errors encountered in master-slave replication or errors of the specified type , avoid slave End copy interrupt .
##  Such as ：1062 An error is a duplicate of some primary keys ,1032 The error is because the master-slave database data is inconsistent 
slave_skip_errors=1062

2.3、 After revising my.cnf Restart after master example

docker restart mysql-master

2.4、 Get into mysql-master Containers

docker exec -it mysql-master /bin/bash
mysql -uroot -p

2.4、mysql-master Create a data synchronization user in the container instance

#  Specify the user name as salve, The password for 123456 Users can access mysql-matser
CREATE USER 'slave'@ '%' IDENTIFIED BY 'root';

# Authorize this user 
GRANT REPLICATION SLAVE,REPLICATION CLIENT ON *.* TO 'slave'@'%';

2.5、 View the master-slave synchronization status in the master database

show master status;

3、Mysql Create steps from replication

3.1、 Create a new instance from the server container 3308

docker run -p 3308:3306 --name mysql-slave -v /temp/mysql/mysql-slave/log:/var/log/mysql -v /temp/mysql/mysql-slave/data:/var/lib/mysql -v /temp/mysql/mysql-slave/conf:/etc/mysql -e MYSQL_ROOT_PASSWORD=123456 -d mysql:5.7

3.2、 Get into /temp/mysql/mysql-slave/conf New under the directory my.cnf

from my.cnf Profile contents

[mysqld]
##  Set up server_id, You need to be unique in the same LAN 
server_id=102

##  Specify the name of the database that does not need to be synchronized 
binlog-ignore-db=mysql  

##  Turn on binary log function , in preparation for Slave As an instance of another database Master When using 
log-bin=mall-mysql-slave1-bin  

##  Set the memory size of binary log （ Business ）
binlog_cache_size=1M  

##  Set the binary log format to use （mixed,statement,row）
binlog_format=mixed  

##  Binary log expiration cleanup time . The default value is 0, Does not automatically clean up .
expire_logs_days=7  

##  Skip all errors encountered in master-slave replication or errors of the specified type , avoid slave End copy interrupt .
##  Such as ：1062 An error is a duplicate of some primary keys ,1032 The error is because the master-slave database data is inconsistent 
slave_skip_errors=1062  

## relay_log Configure relay logs 
relay_log=mall-mysql-relay-bin  

## log_slave_updates Express slave Write the copy event to your own binary log 
log_slave_updates=1  

## slave Set to read only （ have super Except for users with permission ）
read_only=1

3.3、 After revising my.cnf Restart after slave example

docker restart mysql-slave

3.4、 Get into mysql-slave Containers

docker exec -it mysql-slave /bin/bash
mysql -uroot -p

3.5、 Configure master slave replication in the slave database

change master to master_host=' Host the host ip',  master_user='slave', master_password=' Lord mysql password ', master_port=3307, master_log_file='mall-mysql-bin.000001', master_log_pos=617,master_connect_retry=30;

• mysql Description of master-slave copy parameters ：
  

• View host host ip

3.6、 View the master-slave synchronization status in the slave database

show slave status \G;

3.7、 Start master-slave synchronization in the slave database

start slave;

4、 Master slave replication test